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KMID : 0359319990390051021
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Korean Journal of Veterinary Research
1999 Volume.39 No. 5 p.1021 ~ p.1027
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Study of plasma β-carotene concentration in dairy cows
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Abstract
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This study was carried out to determine the effects of β-carotene on the control of mastitis in dairy cows during the dry period. The relationship between the levels of plasma β-carotene and the status of udder health in Holstein dairy cows were investigated. Blood samples were collected from 117 cows to compare the levels of plasma β-carotene in lactating cows. The levels of plasma β-carotene were 1.82㎍/㎖ in healthy cows(n = 65) and 1.12㎍/㎖ in mastitic cows(n = 52), respectively(p $lt; 0.01). In the experiment to compare the level of plasma β-carotene in the cows at different stages of lactation, the plasma β-carotene levels were 1.73㎍/㎖ in lactating cows(n = 22), 1.29㎍/㎖ in nonlactating cows(n = 35) and 0.43㎍/㎖ in cows after calving(n =16)(p $lt; 0.05).
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